Sena 10U Motorcycle Bluetooth Communication System with Handlebar Remote for Schuberth C3/C3 Pro Helmet Invisible beauty with custom design Safe and easy operations by Bluetooth Low Energy Handlebar Remote Bluetooth intercom up to 1.6 kilometers (1.0 mile); Four-way intercom ; Universal Intercom Music sharing; Built-in FM radio tuner with a station scan and save function Voice prompts; Smartphone App for iPhone and Android